Question about Cars & Trucks
I took it to the service center, they did not know the probleme they assumed something on the transmission; i told them the same will hapen if the car , in the morning , was not clearly heated before moving from the parking.
Could be bad EGR valve or vacuum leak. Egr valve, depending on whether it is stuck open or closed can act like the old choke thermostats on the carburator system making the vehicle run and idle rough when it is cold OR hot but normally only one or the other. Will run fine cold but rough once it's hot or rough when cold and fine when hot. Check or have someone check for any trouble codes in the system. It can hold codes and not make the check engine light come on and may help diagnose the problem.
Posted on Jan 12, 2013
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Posted on Jan 02, 2017
SOURCE: subaru vibration
I had similar problem with my '99 outback. Replaced the front half shafts and seemed much better. A few months later seemed to be comming back so replaced the driver side shaft again and the problem disappeared. I had put in rebuilt shafts and the driver side shaft was not rebuilt correctly.
Posted on May 01, 2009
It sounds like there may be an issue with your ignition system.
Check the ignition wires, distributor cap, spark plugs.
Posted on Sep 09, 2009
SOURCE: The rpm fluctuates at idle
It could be several things...low fuel pressure, a lazy 0 2 sensor, and even an IAC. If there isn't any service engine lights coming on, you will need a qualified tech to do the test since a lazy 0 2 sensor has to be looked at with some type of a volts meter and a scanner has the capability of doing a better job yet since you wouldn't have to get underneath the vehicle. Don't be fooled into thinking that it is just one thing; it could be several depending on the mileage.
Posted on Oct 03, 2009
I own a 2006 Zephyr with similar issues. My dealer reset the transmission which briefly helped but the problem quickly came back. My son is a certified Master Mechanic with Ford but in business for himself. He tested the car and told me the valve body was bad, printed out the TSB's (technical service bulletins) issued by Ford for the 2006 Zephyr, 2007-08 MKZ's and other models equpped with an Aisin transmission. My car was a certified Preowned vehicle and I have the ESP Premium coverage for it. I took the car back to the dealer, who is replacing the valve body, it's being covered by the warranty and the $100.00 deductible is being waived because the valve body should have been replaced the 1st time. The TSB states that if there are no "codes" showing, the car has over 20,000 miles, the valve body should be replaced. It's an expensive repair but Ford is aware of the problem. Contact your dealer, let them know you are aware of the TSB's issued for the car, especially if you have the ESP protection. If not for my son I wouldn't have known. If you need any further info, contact me, I'll be glad to help you. My car has 62,000 miles, I love it and I'm sure glad I found the problem before I hit the 75,000 limit for the warranty.
Posted on Oct 05, 2010
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